Hi.
I would guess that its the lift and drag pins on the fuselage side that "
carries" the load.
Tim
On 7 June 2013 14:45, William Daniell <wdaniell.longport@gmail.com> wrote:
> Graham****
>
> ** **
>
> I am very interested by this statement =85.so as I understand it the spar
s
> are the main load bearing structure in the airpcraft=85 if the seat back
bush
> does not do the this what does? How does the motorglider work?****
>
> ** **
>
> Will****
>
> ** **
>
> *From:* owner-europa-list-server@matronics.com [mailto:
> owner-europa-list-server@matronics.com] *On Behalf Of *GRAHAM SINGLETON
> *Sent:* Friday, June 07, 2013 04:42
> *To:* europa-list@matronics.com
> *Subject:* Re: Europa-List: You'll Cry Pip Pins****
>
> ** **
>
> Frans
> The pip pin on the port side is there to prevent the starboard spar from
> twisting away from the
> port spar under high load. The starboard side has no need of retention
> because the overlapping
> spar provides that function.
> Strictly speaking the bush in the seat back bulkhead is of no value, in
> fact it increases the load on the spars.
> Be better without it as per the motor glider. (but DYOR)
> Graham****
>
> ** **
>
> ** **
> ------------------------------
>
> *From:* Frans Veldman <frans@privatepilots.nl>
> *To:* europa-list@matronics.com
> *Sent:* Friday, 7 June 2013, 9:07
> *Subject:* Re: Europa-List: You'll Cry Pip Pins****
>
>
> On 06/07/2013 09:40 AM, Tony Renshaw wrote:
>
> > Talking about pip pins, does anyone see any merit in using two of the
> Port pip pins, another for the Std spar too?
>
> If I recall correctly, there was some technical reason why both pip pins
> are different. I forgot the details, but this discussion has been held
> before and someone with insight argued why using a pip pin on the
> starboard side was not such a good idea. It had something to do with the
> different arrangement and thus different torsional loads on the
> starboard side because the spars overlay "the other way around". The pin
> had to be longer there to allow some movement, and because it needs to
> have some play a pip pin can not be used (unless you make it longer than
> it should be but then you need an additional retaining mechanism which
> of course negates the whole idea of using a pip pin in the first place.)
>
> Although I have modified my aircraft quite a lot, this is an area where
> I am shy to deviate from the build plan, as it is one of the most
> critical structural area's. As all of the other pins are pip pins my bet
> is that there must have been a reason why to use a different arrangement
> on this specific pin. Surely it can't be because it was cheaper or so,
> or the designer was short of one pip pin and decided to wo= -->
> http://www.matronics.com/Navigator?Europa-List
> _ref="http://forums.matronics.com/"; target="_blank">
> http://forums.matronbsp; Thank you for your generous nbsp;
> -Matt Dralle, List Admin.*
>
>
> *
>
> * *
>
> * *
>
> **
>
> **
>
> **
>
> **
>
> **
>
> *http://www.matronics.com/Navigator?Europa-List*
>
> *< - MATRONICS WEB FORUMS -*
>
> **
>
> *http://forums.matronics.com*
>
> **
>
> **
>
> **
>
> **
>
> *http://www.matronics.com/contribution*
>
> **
>
> * *
>
> *
>
===========
===========
===========
===========
> *
>
>
|